The Ligne d'Integration Laser (LIL): construction status and first 1-w light early results

Fleurot, N.; Adolf, Alain; André, M.; Bruneau, J.; Cavailler, C.; Novaro, M.; Philippe, P.; Kovacs, Francisco M; Garrec, B. Le; Nicola, J. M. Di; Leidinger, J.-P.

doi:10.1117/12.516730

Cited by 5 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This high power laser fusion facility, similar to the National Ignition Facility [2] in the United States, will deliver a total energy of more than one MJ at a wavelength of 351nm. The Ligne d'Intégration Laser (LIL) [3], a prototype of the future LMJ, is intended to validate the technological choices made for the future LMJ and is our working environment.…”

Section: Introductionmentioning

confidence: 99%

Study of the LIDT degradation of optical components by intentional organic contamination

2012

View full text Add to dashboard Cite

The lifetime of optical components submitted to high laser fluences is decreased under organic contaminated environment. Our previous studies have shown that chemical species outgassed from materials present in the laser environment of the Ligne d'Intégration Laser (LIL) and in the optics packaging (phthalates, silicones, and aromatic compounds) are potential contaminants for optics. In order to avoid the presence of such molecules in the Megajoule Laser (LMJ) environment, a new comprehensive program is started up using a qualified Micro-chamber/Thermal Extractor (M-CTE250 Markes International) for controlled contaminations of optics. The final target is the development of a qualification procedure to determine the compatibility of materials used for the building of the LMJ with the LMJ optics. First results of this program will be presented.

show abstract

Section: Introductionmentioning

confidence: 99%

Study of the LIDT degradation of optical components by intentional organic contamination

2012

View full text Add to dashboard Cite

show abstract

“…This high power laser fusion facility, similar to the National Ignition Facility [2] in the United States, will deliver a total energy of 1:8 MJ at a wavelength of 351 nm. The Ligne d'Intégration Laser (LIL) [3], a prototype of the future LMJ, is intended to validate the technological choices made for the future LMJ. The LIL, which consists of eight individual beams, is our working environment.…”

Section: Introductionmentioning

confidence: 99%

Laser induced damage of fused silica polished optics due to a droplet forming organic contaminant

et al. 2009

View full text Add to dashboard Cite

We report on the effect of organic molecular contamination on single shot laser induced damage density at the wavelength of 351 nm, with a 3 ns pulse length. Specific contamination experiments were made with dioctylphthalate (DOP) in liquid or gaseous phase, on the surface of fused silica polished samples, bare or solgel coated. Systematic laser induced damage was observed only in the case of liquid phase contamination. Different chemical and morphological characterization methods were used to identify and understand the damage process. We demonstrate that the contaminant morphology, rather than its physicochemical nature, can be responsible for the decrease of laser induced damage threshold of optics.

show abstract

“…[1][2][3][4][5][6][7][8][9][10] This approach estimates the current beam position from the image, adjusts mirrors relative to an accurate reference measurement of physical beam center and attempts to minimize the deviation between them. [2][3][4][5][6][7][8][9][10] Current systems employ the same basic principle, but utilize much improved high-resolution video cameras and more accurate position control systems. 10 However, even with these improved systems, should an anomalous or equivalently "off-normal" image occur due to component malfunctions (sticky mirror, stepping motor failure, component failure, etc.…”

Section: Introductionmentioning

confidence: 99%

Detection of off-normal images for NIF automatic alignment

Candy

Awwal

McClay

et al. 2005

Photonic Devices and Algorithms for Computing VII

View full text Add to dashboard Cite

One of the major purposes of National Ignition Facility at Lawrence Livermore National Laboratory is to accurately focus 192 high energy laser beams on a nanoscale (mm) fusion target at the precise location and time. The automatic alignment system developed for NIF is used to align the beams in order to achieve the required focusing effect. However, if a distorted image is inadvertently created by a faulty camera shutter or some other opto-mechanical malfunction, the resulting image termed "off-normal" must be detected and rejected before further alignment processing occurs. Thus the off-normal processor acts as a preprocessor to automatic alignment image processing. In this work, we discuss the development of an "off-normal" pre-processor capable of rapidly detecting the off-normal images and performing the rejection. Wide variety of off-normal images for each loop is used to develop the criterion for rejections accurately.

show abstract

The Ligne d'Integration Laser (LIL): construction status and first 1-w light early results

Cited by 5 publications

References 0 publications

Study of the LIDT degradation of optical components by intentional organic contamination

Study of the LIDT degradation of optical components by intentional organic contamination

Laser induced damage of fused silica polished optics due to a droplet forming organic contaminant

Detection of off-normal images for NIF automatic alignment

Contact Info

Product

Resources

About